Two-stroke engines are relatively cheaper to manufacture but require more upkeep than four-stroke engines. But they aren't gone from every part of the world.

A Hit With Every Two Strokes. Two-stroke engines combine multiple cycles into the same stroke of the piston. A two-stroke engine combines intake (“scavenging”) and compression into one stroke ...

Delivering a powerful punch each and every turn of the crank. Read the full story on the two-stroke engine's expected revival, at Automobile Magazine online.

In an engine, "stroke" refers to the movement of the piston, either up or down. In a four-stroke engine, the fuel-air mixture is drawn in by the piston as it travels down on the first stroke.

Traditional Two-Stroke Engine Issues A traditional two-stroke engine has the piston pushing down after firing, moving past an exhaust port and allowing the exhaust gases to leave the chamber.

Each piston fires on each stroke, making this a two-stroke. The engine has no traditional valves, cams, or camshafts, and no head, so it’s simpler and cheaper to manufacture, assemble and operate.

Two-stroke engines were phased out by tough pollution laws, but they could be making a comeback with KTM, Honda and boutique builders. ... In 2015, Honda filed a patent for a new two-stroke motor ...

Ferrari continues to explore hydrogen-powered drivetrain solutions, patent documents discovered by AutoGuide.com indicate Ferrari is looking at a two-stroke 3- or 6-cylinder opposed piston engine ...

It basically looks like a conventional piston engine, except it uses a complicated geared crankshaft arrangement that allows each piston to reach two top- and bottom-dead-center positions over the ...

The company is showcasing a “one-stroke” engine that works as an opposed piston with a wavy twist. The “one-stroke” is in quotes as the engine is actually a two stroke (by definition), in ...